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<blockquote data-quote="inyati13" data-source="post: 1129597" data-attributes="member: 17767"><p>Dave, I think the condition of the cows or heifers is a factor. The Zoetis agent related to me that "if the cow or heifer is in good health", the studies they have conducted and the independent studies they have referenced, indicate that the abortion rate in cows is rare. It is about 15 % in heifers. See my case number reference with Zoetis below. I have the one personal experience with my heifer to present. I am not disparaging your experience with abortion, I respect anyone's personal experience; I am referencing that your experience is far greater than what studies show.</p><p></p><p>I had the heifer from Rocking P that came into my herd in Late Fall 2012. She was purchased as open. In fact, she got a shot of lut from Keith before he shipped her to me. I gave her two BS Gold FP 5 shots about 30 days apart before planned breeding in the spring of 2013. I never could catch her in heat so I turned her out with the bull.</p><p></p><p>In Sept 2013, I saw her bag dropping and getting loose. I thought that was impossible. I calculated back and found that she had to have been pregnant when she came. I called Keith and he realised she was with yearling bulls before she left. There is a window when the lut will not effectively abort the fetus. Then, the fetus held in the face of two shots of BS Gold FP 5 MLV 30 days apart. I sold the calf for about $1,000 at 545 pounds about a month ago at 7 months of age. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big grin :D" loading="lazy" data-shortname=":D" /> </p><p>Encouraged by Lucky_P, I sent a wedge of the ear to University of KY and tested for BVD persistently infected and it was negative.</p><p></p><p>You mentioned that you buy "heifers" at a sale barn. You may have had a high abortion rate (over 50 %) as a result of other factors being involved. Health/condition and stress related to coming into your program. Based on the research, the abortion rate is relatively low for healthy "cows". I agree that regardless of the rate of occurence, the risk is not worth adopting the practice of vaccinating pregnant cows/heifers.</p><p></p><p>Here is the reference to my case with Zoetis. I posted it on CT.</p><p><a href="http://www.cattletoday.com/forum/viewtopic.php?f=7&t=86709" target="_blank">viewtopic.php?f=7&t=86709</a></p></blockquote><p></p>
[QUOTE="inyati13, post: 1129597, member: 17767"] Dave, I think the condition of the cows or heifers is a factor. The Zoetis agent related to me that "if the cow or heifer is in good health", the studies they have conducted and the independent studies they have referenced, indicate that the abortion rate in cows is rare. It is about 15 % in heifers. See my case number reference with Zoetis below. I have the one personal experience with my heifer to present. I am not disparaging your experience with abortion, I respect anyone's personal experience; I am referencing that your experience is far greater than what studies show. I had the heifer from Rocking P that came into my herd in Late Fall 2012. She was purchased as open. In fact, she got a shot of lut from Keith before he shipped her to me. I gave her two BS Gold FP 5 shots about 30 days apart before planned breeding in the spring of 2013. I never could catch her in heat so I turned her out with the bull. In Sept 2013, I saw her bag dropping and getting loose. I thought that was impossible. I calculated back and found that she had to have been pregnant when she came. I called Keith and he realised she was with yearling bulls before she left. There is a window when the lut will not effectively abort the fetus. Then, the fetus held in the face of two shots of BS Gold FP 5 MLV 30 days apart. I sold the calf for about $1,000 at 545 pounds about a month ago at 7 months of age. :D Encouraged by Lucky_P, I sent a wedge of the ear to University of KY and tested for BVD persistently infected and it was negative. You mentioned that you buy "heifers" at a sale barn. You may have had a high abortion rate (over 50 %) as a result of other factors being involved. Health/condition and stress related to coming into your program. Based on the research, the abortion rate is relatively low for healthy "cows". I agree that regardless of the rate of occurence, the risk is not worth adopting the practice of vaccinating pregnant cows/heifers. Here is the reference to my case with Zoetis. I posted it on CT. [url=http://www.cattletoday.com/forum/viewtopic.php?f=7&t=86709]viewtopic.php?f=7&t=86709[/url] [/QUOTE]
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